The Selkirk stove vent pipe line includes many unusually shaped pieces in order to fit your specific venting needs. This tee section can function as a connection point for an additional appliance vent, or can simply create a ninety degree turn when the included cover is used. The manufacturer backs up this product with a lifetime warranty, and the double steel wall construction ensures long lasting service. Your wood burning stove will be more efficient and safe when vented with Selkirk pipe.